Access port device and method of manufacture

Abstract

A surgically implantable access port device is disclosed. The device includes a housing, a self-sealing septum, and a cup. The housing includes an internal bore leading to an upper opening, and the bore is defined by a cylindrical side wall having an inwardly protruding ledge located beneath the upper opening. The self-sealing septum is received in the bore at a location closing the upper opening and bearing against the ledge. The cup is received in the bore, and cooperates in a fixed association with the side wall of the bore to compress the septum against the ledge. The cup cooperates with the septum in defining a liquid retaining chamber. The device further includes a conduit connected to the cup and leading from the chamber to the exterior of the housing. Liquid may be injected into or removed from the chamber by penetration of the septum and passage through the conduit.

What is claimed is: 
     
       1. A surgically implantable device comprising: a housing including an internal bore leading to an upper opening, said bore being defined by a cylindrical side wall having an inwardly protruding ledge located beneath said upper opening, said housing being molded of a plastic material;   a self-sealing septum received in said bore at a location closing said upper opening and bearing against said ledge;   a cup received in said bore and being in mechanical interengagement with said side wall, said cup cooperating in a fixed association with the side wall of said bore to compress and fix said septum against said ledge and to cooperate with said septum in defining a liquid retaining chamber, said cup comprises a non-plastic material with external means for projecting radially outwardly into the side wall of said bore, said external means comprising a plurality of teeth for engaging said cylindrical side wall of said housing; and   a conduit connected to said cup and leading from said chamber to the exterior of said housing, whereupon liquid may be caused to flow into or from said chamber through said conduit.   
     
     
       2. The surgically implantable device of claim 1, wherein said plurality of teeth are formed integral with said cup. 
     
     
       3. A surgically implantable device comprising: a housing including an internal bore leading to an upper opening, said bore being defined by a cylindrical side wall having an inwardly protruding ledge located beneath said upper opening, said housing being molded of a plastic material;   a self-sealing septum received in said bore at a location closing said upper opening and bearing against said ledge;   a cup received in said bore and being in mechanical interengagement with said side wall, said cup cooperating in a fixed association with the side wall of said bore to compress and fix said septum against said ledge and to cooperate with said septum in defining a liquid retaining chamber, said cup comprises a non-plastic material with external means for projecting radially outwardly into the side wall of said bore, said external means comprising a plurality of non-plastic barb rings encircling an outer wall of said cup for engaging said cylindrical side wall of said housing; and   a conduit connected to said cup and leading from said chamber to the exterior of said housing, whereupon liquid may be caused to flow into or from said chamber through said conduit.   
     
     
       4. A surgically implantable access port device comprising: a housing formed of a thermoplastic material and including an internal bore leading to an upper opening, said bore being defined by a cylindrical side wall having an inwardly protruding ledge located beneath said upper opening;   a non-thermoplastic cup received within said bore, said cup including a side wall and an upper portion, and defining an internal chamber in fluid communication with a conduit extending to the exterior of said housing;   a self-sealing septum compressed between said upper portion of said cup and said ledge within said housing, at least a portion of said septum being exposed through said upper opening in said housing and permitting the passage of a needle therethrough; and   securing means associated with said side wall of said bore and side wall of said cup, said securing means comprises a plurality of non-thermoplastic barbs on an outer circular wall of said cup, said barbs being adapted to engage said cylindrical wall of said housing for securing at least a portion of said cup side wall with at least a portion of said cylindrical side wall of said housing for limiting the movement of said cup with respect to said housing.